Refrigerator



FIG. 1 is a front and right side perspective view of a refrigerator embodying the inventive ornamental design;

FIG. 2 is a front and left side perspective view of the apparatus of FIG. 1 embodying the inventive ornamental design;

FIG. 3 is a front elevation view of the apparatus of FIG. 1 embodying the inventive design;

FIG. 4 is a back elevation view of the apparatus of FIG. 1 embodying the inventive design;

FIG. 5 is a left side elevation view of the apparatus of FIG. 1 embodying the inventive design;

FIG. 6 is a right elevation view of the apparatus of FIG. 1 embodying the inventive design;

FIG. 7 is a top plan view of the apparatus of FIG. 1 embodying the inventive design;

FIG. 8 is a bottom elevation view of the apparatus of FIG. 1 embodying the inventive design; and,

FIG. 9 is an enlarged elevation view of the portion identified as 9 in FIG. 3.

The appearance of elements presented in broken line format form no part of the claimed design. 

The ornamental design for a refrigerator, as shown and described. 